U.S. smartphone users fired up the photo-sharing app Instagram more than Twitter during the month of August, according to new data from comScore.

As first reported by AllThingsD, Instagram, now owned by Facebook, had an average of 7.3 million smartphone users accessing its service every day in August, comScore said. In comparison, Twitter had 6.868 million daily visitors on mobile devices during the same period.

ComScore's data reflects usage among U.S. smartphone owners aged 18 and older accessing the service on a device running iOS, Android, or RIM operating system via a mobile Web browser or app.

Plus, beyond just visiting Instagram more, mobile users also spent more time on the popular photo-sharing app than they did on Twitter. Users last month spent an average of 257 minutes on Instagram via
mobile compared to 169.9 minutes viewing content on Twitter.

Even so, Twitter still reigned supreme when it came to the total number of unique visitors. The micro-blogging service had approximately 29 million unique smartphone visitors during the month, compared to Instagram's 21.9 million. To put this in perspective, the data indicates that Twitter had a greater number of smartphone users visiting its site overall, while Instagram's fans were clicking on the app more frequently and spending more time on it each time they returned.

The data is notable given that Instagram is not even two years old yet, while Twitter has been around since 2006. Remember, Instagram was exclusive to iOS devices until April, when the company released an Android version.

Angela has been a PCMag reporter since January 2012. Prior to joining the team, she worked as a reporter for SC Magazine, covering everything related to hackers and computer security. Angela has also written for The Northern Valley Suburbanite in New Jersey, The Dominion Post in West Virginia, and the Uniontown-Herald Standard in Pennsylvania. She is a graduate of West Virginia University's Perely Isaac Reed School of Journalism.
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